Next step would be to look at the rom sizes, I guess, but honestly I'm too lazy for that, so if anyone wants to step in... Also, I only checked for "at least one" ym2203, not "exactly two", so that's another possible refinement.

As it had a sticker "Player 1 Jump and Shoot" and "Player 2 Jump and Shoot" it could be something around Rambo 3 or Gunfront or...man I just realized I dont know many of those names. :/
I sent the board toBad_Ad84and it should arrive any day now.

Now I'm wondering what that jump button is for.
(And why neither Exerizer nor Sky Fox are on the list of games I extracted from MAME. edit: Ah for some reason it loads more roms (13) than I expected. odd.)